Bailey Approach - The Electrical System - 12 Volt

There are available several proprietary makes
of equipment for the purpose (e.g. Martindale
tester unit).
Check all Motorhome equipment is set-up
to accept the site supply before actually
switching on.
Mains unit
The mains unit replaces the conventional fuse
box. Similar, but larger units are often tted
in newer houses. The unit gives overload
and earth leakage protection for the 230V
electrical supply in your Motorhome.
For normal operation all switches on the unit
need to be in the ON position. The switches
on the left of the unit are known as M.C.B.’s
(miniature circuit breakers).
In the event of a fault the M.C.B. ‘trips’ i.e.
automatically moves to the OFF position.
After elimination of the fault the M.C.B. can be
re-set by switching to the ON position. (Against
the spring pressure in an upwards direction).
If an earth fault develops or a person were to
touch a live piece of equipment, the leakage of
current to earth should immediately operate
the RCD (residual current device) and ‘trip’ the
main switch, to its OFF position.
This switch is only re-settable after elimination
of the fault.
To re-set, operate the switch as for M.C.Bs.
Every time you connect to a site supply the RCD
should be checked by operating the test button
marked ‘T’. The unit should immediately switch
to the off position. If the Unit does not switch
off, do NOT use the mains supply system and a
qualied electrician should be called.
If the unit does switch off, the test is complete
and the switch can be reset restoring the
supply back to normal.
Having too many appliances switched on at the
same time will trip the MCB. This is a safety
measure.
It is essential that connections are made
exactly as shown. If terminal markings are
not in accordance with the diagram they must
be ignored. If in doubt consult a qualied
electrician.
Always disconnect the electrical connector
between the towing vehicle and the
Motorhome before connecting a 230V supply
to the Motorhome and before charging the
Motorhome battery by any other means.
It is possible that all of the 230V mains
electrical equipment may not be able to be
operated simultaneously.
Many motorhome park mains hook up point
provides a maximum output of 16 amps and
on some continental sites the available output
may be as low as 5 amps. If your loading
exceeds the site supply it may trip the parks
circuit breaker. Please check the available
mains output in amps with your site operator.
No appliance shall be used outside when
being connected to the internal socket.
THE ELECTRICAL SYSTEM – 12 VOLT
Your motorhome is tted with a duel stage
power supply/charger supplying 14.2V to your
leisure battery and between 13.6/13.8V to the
habitation unit. This converts the 230 volt AC
supply to 12- volt DC. This enables the 12 volt
equipment in the motorhome to function and
charges the motorhome leisure battery. A
fully charged leisure battery should read 12.7
volts on the voltmeter mounted in the control
panel. During charging the control panel will
temporarily read between 14.2/13.8 volts.
The charger is capable of charging leisure
batteries and will not overcharge. The 12 volt
system is designed to operate with a leisure
battery in circuit and should not be turned on
without one connected. The 12 volt supply to
the Motorhome services can be isolated via the
12 volt on/off switch on the control panel.
The 12- volt electrical systems fuses are located
either in a bed box or under the xed bed. It
has 14 fused each having identication to their
particular use. If a fuse is to be replaced it
must be with one of the same rating as the one
that is removed.
For more information on the power supply
please refer to the specication page in your
hand book.
Auxiliary Battery storage/mains inlet
The battery is located under the oor in the
motorhome in a sealed compartment. This
compartment will accommodate two batteries
up to 110 amperes/hours capacity. The battery
must be placed in the tray provided in the
battery storage compartment , and this must
be used at all times.
A battery of not less than 60 amperes/hours
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CONNECTION OF SERVICES- The Electric System
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